Abiotic and Biotic Factors - Ms. Venn...Levels of organization in an ecosystem Organism An...

Abiotic and Biotic FactorsPresented by Kesler Science

1. What are the biotic and abiotic parts of an ecosystem?

2. How do organisms and populations in an ecosystem depend on and compete for biotic and abiotic factors?

Essential Questions:

Levels of organization in an ecosystem

Organism

An individual form of life, such as a plant, an animal, a bacterium, a protist, or a fungus.

A specific species that can mate with one another and produce offspring.

Abiotic and Biotic Factors

© KeslerScience.com

Levels of organization in an ecosystemPopulations

• Comprised of all the individuals of a given species in an area at a certain time.

• Not all individuals are identical.

• Most importantly, not all members of the population are equal in their ability to survive and reproduce.



Levels of organization in an ecosystemCommunity

The populations of organisms of different species in a specific area at a given time.



Ecosystem• All of the living (biotic) and all

of the physical nonliving factors (abiotic) in an area.

• Ecosystems can only support a certain number of individuals based on the amount of food, water, living space, mates and other resources.



Biotic Factors • Bio = prefix for life

• Living or once-living organisms in an ecosystem.

•Animals•Plants•Fungi•Bacteria •Protists



Abiotic Factors• A = prefix for not or without

• Non-living elements in an ecosystem.

•Water•Air•Soil – rocks and minerals•Sunlight•Temperature



Quick Action – Abiotic and Biotic Factors

1. Make a T chart in your INB page _____.

2. List all the abiotic and biotic factors you see in this ecosystem.

3. How many ofeach type offactor were you able to name?


Quick Action – INB Template

Title INB Template

1. Cut out the template.

2. Glue into the top of INB page 15.

3. Define and make a list of biotic factors.


Biotic

FactorsGlue this side to journal


Title INB Template

1. Cut out the Template

2. Glue along the narrow flap and underneath “temperature” into our INB bottom of page 15.

3. Draw and color pictures to represent each abiotic factor.

4. Fold along dotted lines.


Ab

iotic

Fa

cto

rs

Tem

pe

ratu

re

Air

Wa

ter

So

il, R

oc

ks

& M

ine

rals

Lig

ht


Title INB Template1. Cut out the Template along

dark lines.

2. Draw a picture of a neighborhood park on the top portion.

3. Glue top portion into INB.

4. Fold along dotted line.

5. List biotic and abiotic factors found in your picture under the appropriate flap.


Biotic

FactorsAbiotic

Factors

Draw a picture of a neighborhood park. List the biotic &

abiotic factors under the flaps.


What would happen if…?

Two mice produced 56 baby mice each year.

Each of these mice has 56 babies each year…

Calculate the total mice born in one year started by the original pair.


We’d be run over with

mice on the planet!!!

Why doesn’t this really

happen

Carrying Capacity• The largest number of

individuals of the same speciesthat an area can support.

• If the population exceeds the carrying capacity, some individuals will die or move to another location.

• Determined by elements called limiting factors.




Quick Action - Abiotic and Biotic Factors

1. What is the carrying capacity

of this fish tank?

3. What would happen if a small

bass was added to the tank?

4. How would the bass affect the carrying capacity of the tank?

Limiting Factor• An abiotic or biotic factor

that limits the number of individuals that can live in an ecosystem.

• Keeps the population from growing too large.



How do biotic factors limit other organisms in its environment?

Competition for food

•When resources are scarce

fewer organisms can survive.

•When resources are plentiful

greater numbers of organisms

can survive.



How do biotic factors limit other organisms in their environment?

Predator-prey relationships

•Greater the number of prey

the greater the number of

predators

•Fewer the number of prey

the fewer the number of

predators




Parasitism – when an organism

lives off of a host organism

sometimes killing the host.

•Worms in animal digestive tracts

•Mistletoe in trees

•Pine bark beetle invade and kill

pine trees.




Disease – when outbreaks kill

off most or all of a population.

• Influenza outbreak causes

millions of human deaths

in 1918.

•Lyme Disease carried by ticks.




Human activities destroy

animal habitats

• development

• damming rivers

• clear cutting forest



Quick Action –

1. Get with a partner and discuss what competition is.

2. Look at the picture and describe what competition is taking place between the tree and the giraffe.

3. Explain how both have adapted to this competition.

4. Are these abiotic or biotic factors competing?



How do abiotic factors limit organisms in an ecosystem?• Sun - availability increases photosynthesis

•Plants compete for sunlight by growing taller than those around them.

• Temperature

•Warm lush areas support greater numbers of populations with less competition occurring.

•Cold harsh areas support limited numbers of populations with greater competition occurring.



How do abiotic factors limit organisms in an ecosystem?Soil

•Nutrient rich soils produces

more carbon, nitrogen, phosphorus

and support larger populations.

(Less competition)

•Nutrient poor soils support smaller

populations. (more competition)



How do abiotic factors limit organisms in an ecosystem?Water

Availability, movement, temperature,

saltiness, chemical components

(quality) all affect competition and

ability to survive in populations.



How do abiotic factors limit organisms in an ecosystem?Changing Conditions

•drought, flood, volcanic eruption, earthquake bring about changes that reduce populations.




1. Get with a partner to discuss what might happen in the following situations.

2. A drought occurs and all the water in the pond dries up.

3. How many of the biotic organisms would survive?

4. How would they be able to survive?

5. Share your findings with the class.


All biotic and abiotic factors are interrelated. In nature you will find that if one factor is changed or removed, it impacts the availability of other resources within the system.



What factor was removed

from this ecosystem?

How did it affect the

population in the ecosystem?

Check for Understanding

Can you…

1. List the abiotic and biotic factors in an ecosystem?

2. Investigate how organisms and populations in an ecosystem compete for biotic and abiotic factors?


Date post:	08-May-2020
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Abiotic and Biotic Factors - Ms. Venn...Levels of organization in an ecosystem Organism An...

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